Russian billionaire and presidential candidate Mikhail Prokhorov (C) attends a basketball training session as he visits educational comprehensive school number 59 in Moscow on Thursday. Russians will vote in a presidential election on March 4.

Alexei Nikolsky / AFP - Getty Images

Russia's Prime Minister Vladimir Putin sits in a bobsled as he attends a training session of the Russian National Team during Putin's visit to Paramonovo bobsleigh and tobogganing center outside Dmitrov in the Moscow region Thursday. After serving two consecutive presidential terms between 2000 and 2008 and a term as prime minister, Putin is seeking a third term in the March 4 presidential election.